报告题目：Solitons, Breathers, and rogue waves in ferromagnet (铁磁中的孤子,呼吸子和怪波)
报 告 人：李再东 教授 (河北工业大学)
报告时间：2017年4月1日（周六）10:00
报告地点：校本部G309
邀请人：张永平
报告摘要：
In terms of Darboux transformationwe investigate the dynamic process of spin wave passing through amagnetic soliton. It causes nonlinear excitations, such as Akhmediev breathers solution and Kuznetsov-Ma soliton. The former case demonstrates a spatial periodic process of a magnetic soliton forming the petal with four pieces. The spatial separation of adjacent magnetic petals increases rapidly, while one valley splits into two and the amplitude of valley increases gradually with the increasing amplitude of spin wave. The other case shows a localized process of the spin-wave background. In the limit case, we get rogue waves and clarify its formation mechanism.
We also theoretically investigate the effect of Dzyaloshinskii-Moriya interaction on magnetic soliton in anisotropic ferromagnetic nanowires driven by the adiabatic spin-transfer torque. The Dzyaloshinskii-Moriya interaction changes the formation region of soliton solution and the corresponding phase diagram is given for different soliton solution type.
